66448386564 has 24 divisors (see below), whose sum is σ = 177195697728. Its totient is φ = 18985253280.

The previous prime is 66448386553. The next prime is 66448386569. The reversal of 66448386564 is 46568384466.

It is a junction number, because it is equal to n+sod(n) for n = 66448386498 and 66448386507.

It is not an unprimeable number, because it can be changed into a prime (66448386569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 395526027 + ... + 395526194.

It is an arithmetic number, because the mean of its divisors is an integer number (7383154072).

Almost surely, 2^66448386564 is an apocalyptic number.

It is an amenable number.

66448386564 is an abundant number, since it is smaller than the sum of its proper divisors (110747311164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66448386564 is a wasteful number, since it uses less digits than its factorization.

66448386564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791052235 (or 791052233 counting only the distinct ones).

The product of its digits is 79626240, while the sum is 60.

The spelling of 66448386564 in words is "sixty-six billion, four hundred forty-eight million, three hundred eighty-six thousand, five hundred sixty-four".